Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 882

May 29, 201919 counties in Arkansas; 5 counties in Oklahoma; 32 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 29, 2019, 12:18 PM CDT for 19 counties in Arkansas; 5 counties in Oklahoma; 32 counties in Texas. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
May 29, 2019, 12:18 PM CDT (17:18 UTC)
Expired
May 29, 2019, 1:45 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 56 counties

Clark County, AR, Franklin County, AR, Garland County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Bryan County, OK, Choctaw County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Grayson County, TX, Gregg County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Limestone County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Smith County, TX, Tarrant County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 182 km from the middle of the area, began a volume at 17:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 5.3 hours before the alert went out and 187 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2019-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1385 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2019-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1385 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
652 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
242 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.3

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 1:07 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 14 more113 min
May 29, 1:39 AM CDTSevere Thunderstorm WatchSPCCrawford, Franklin, Madison, Sebastian, Washington3 hr
May 29, 3:11 AM CDTMesoscale DiscussionSPCBaxter, Boone, Crawford, Franklin, Izard, Johnson and 8 more94 min
May 29, 3:11 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Cleburne, Conway, Fulton, Independence and 13 more5 hr
May 29, 6:06 AM CDTSevere Thunderstorm WatchSPCClay, Craighead, Greene, Mississippi, Poinsett2 hr
May 29, 9:40 AM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Madison, Washington65 min
May 29, 10:04 AM CDTSevere Thunderstorm WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more7 hr
May 29, 12:46 PM CDTTornado WatchSPCBaxter, Boone, Carroll, Cleburne, Conway, Crawford and 32 more9 hr
May 29, 1:32 PM CDTMesoscale DiscussionSPCBenton, Washington58 min
May 29, 3:12 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Cleburne, Conway, Crawford and 29 more63 min
May 29, 6:22 PM CDTTornado WatchSPCCalhoun, Clark, Cleveland, Columbia, Dallas, Faulkner and 22 more7 hr
May 28, 8:05 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Comanche, Creek, Garfield and 14 more85 min
May 29, 7:31 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 19 more119 min
May 28, 11:48 PM CDTMesoscale DiscussionSPCCrane, Ector, Glasscock, Midland, Pecos, Reagan and 3 more117 min
May 29, 1:56 AM CDTSevere Thunderstorm WatchSPCAndrews, Borden, Callahan, Coke, Crane, Dawson and 24 more8 hr
May 29, 4:50 AM CDTMesoscale DiscussionSPCArcher, Baylor, Coke, Ector, Fisher, Glasscock and 18 more115 min
May 29, 8:39 AM CDTSevere Thunderstorm WatchSPCCooke, Denton, Eastland, Erath, Grayson, Hood and 8 more4 hr
May 29, 9:04 AM CDTMesoscale DiscussionSPCAndrews, Baylor, Borden, Callahan, Coke, Crane and 19 more86 min
May 29, 2:14 PM CDTMesoscale DiscussionSPCCrockett, Edwards, Gillespie, Kerr, Kimble, Mason and 5 more2 hr

Nearby

Mesoscale Discussions in Texas, 2019Mesoscale Discussions in Arkansas, 2019Mesoscale Discussions in Oklahoma, 2019Every mesoscale discussion in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.